Bochy said that Lowry, who will undergo further tests, won't participate in the early portion of the Mexican Winter League schedule for Mazatlan, as he had planned. Bochy didn't rule out Lowry's participation later in the season.

Lowry, the Giants' leading winner in two of the previous three years, has been sidelined all season after undergoing forearm surgery in March. He had reported to the Giants' instructional league camp in Scottsdale, Ariz., to pitch himself back into shape.

Another injured Giant, left fielder Fred Lewis, will be examined Thursday by team doctors to check the progress of his surgically repaired right foot, which was plagued by a bunion. Lewis, who underwent surgery on Sept. 12 and must wear a walking boot for 6-8 weeks, visited the clubhouse and expressed confidence that he will be 100 percent healthy when Spring Training begins in mid-February, assuming he avoids setbacks.

Lewis dismissed the suggestion that his timetable for healing could be longer, saying that he already senses that he's healing.

"I could just feel it inside myself," he said. "I've played with pain and I know how my body feels."

Lewis said that watching the Giants play on television has whetted his desire to be back on the field, particularly during Arizona's four-game sweep last week.

"I felt like I could have contributed in some kind of way," said Lewis, who hit .282 in 133 games this year.

Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.